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Electric Motorsport
Characteristics
Mixed-sexYes
TypeOutdoor

Electric motorsport (also known as electric racing or electric motor racing) is a category of motor sport that consists of the racing of electric powered vehicles for competition, either in all-electric series, or in open-series against vehicles with different power trains. Very early in the history of automobiles, electric cars held several performance records over internal combustion engine cars, such as land speed records, but fell behind in performance during the first decade of the 20th century. With the renaissance of electric vehicles during the early 21st century, notable electric-only racing series have been developed, for both cars and motorcycles, including for example, the FIA Formula E Championship. In other racing events, electric vehicles are competing alongside combustion engine vehicles, for example in the Isle of Man TT and the Pikes Peak International Hill Climb, and in some cases winning outright.

History

Background and early powertrains

The Goldsworthy Gurney Steam bus, in an 1827 illustration.

see also: History of the steam engine and Origins of the locomotive

Early mechanically powered vehicles used steam power, a technology first developed for static applications (notably, Thomas Newcomen 1712 and James Watt 1765) (see History of the steam engine). Steam for vehicle traction was taken up both for road vehicles and for rail by Richard Trevithick who creating the Puffing devil for transporting passengers by road in 1801, and later rail transport, initially for coal (1804) and then for people (Trevethick 1808, George Stephenson 1824 onwards). By the 1830s steam began to be more widely adopted for transportation, with steam carriages for road (e.g. the 1827 Goldsworthy Gurney Steam bus) and for rail, although the latter quickly became more established for medium and longer distance travel. Mechanically powered road vehicles were largely limited to utilitarian vehicles such as traction engines during this period (especially 1850s onwards, see History of steam road vehicles).

Electric car built by Thomas Parker

During the 1860s diverse small experiments with personal transportation and different powertrains blossomed, with steam buggies (e.g. Henry Taylor 1867) and even steam motorcycles (Michaex-Perreux and Sylvester Roper, both around 1867-69). Amédée Bollée developed several long distance (Le Mans to Paris, 210 km) steam vehicles from 1873 onwards, including the 1878 La Mancelle of which 50 were produced, and the 1881 La Rapide capable of 62 km/h (39 mph). An early electric powertrain was exhibited in November 1881 by French inventor Gustave Trouvé at the International Exhibition of Electricity in Paris.[1]

English inventor Thomas Parker, who was responsible for innovations such as electrifying the London Underground, overhead tramways in Liverpool and Birmingham, and the smokeless fuel coalite, built the first production electric car in London in 1884, using his own specially designed high-capacity rechargeable batteries.[2] Parker's long-held interest in the construction of more fuel-efficient vehicles led him to experiment with electric vehicles. He also may have been concerned about the malign effects smoke and pollution were having in London.[3]

Early petrol/gasoline-powered internal combustion engine automobiles were completed almost simultaneously by several German inventors working independently: Karl Benz built his first automobile in 1885 in Mannheim. Benz was granted a patent for his automobile on 29 January 1886, and began the first production of automobiles in 1888, after Bertha Benz, his wife, had proved - with the first long-distance trip in August 1888, from Mannheim to Pforzheim and back (194 km) - that the horseless coach was absolutely suitable for daily use.

Overall, there were a variety of powertrains and vehicle forms experimented with during this period, each with different advantages and disadvantages, range, reliability and speed. In terms of outright performance, different powertrains competed for the land speed record through the turn of the 20th century (see below), and it was not until 1924 onwards that internal combustion powertrains began to dominate this aspect.

Early land speed records

La Jamais Contente electric, 1899
Main article: Land speed record

The table below details the early history of land speed records from 1898 into the early decades of the 20th century. La Jamais Contente (English: The Never Satisfied) was the first road vehicle to go over 100 kilometres per hour (62 mph). It was an electric vehicle with a light alloy torpedo shaped bodywork and with Fulmen batteries. The vehicle established the land speed record on April 29 or May 1, 1899 at Achères, Yvelines near Paris, France. The vehicle had two direct drive Postel-Vinay 25 kW motors, running at 200 V drawing 124 Amperes each[4][5] for about 68 hp, and was equipped with Michelin tires.

As of 1900, 38% of US automobiles, 33,842 cars, were powered by electricity (40% by steam, and 22% by gasoline).[6] However, as combustion powertrains developed, they offered a superior range than electrics, and (especially after the 1908 Ford Model T, and its mass production from 1913 onwards) a much lower purchase price. In 1912 the electric starter motor was invented by Charles Kettering leading to easier and faster starting of internal combustion powertrains, and removing what had been perceived as one of their main drawbacks (having to use a hand crank). Electric and subsequently steam still had some performance advantages and dominated the outright speed record until 1924. Yet the combustion engine technology benefitted from much greater market penetration and thus more development, and began to achieve greater speed performance than electrics and stream from 1924 onwards.

Date Location Driver Vehicle Power Speed over
1 km 		Speed over
1 mile 		Comments
mph km/h mph km/h
December 18, 1898 Achères, Yvelines, France France Gaston de Chasseloup-Laubat Jeantaud Duc[7] Electric 39.24 63.15
December 18, 1898 Achères, Yvelines, France France Gaston de Chasseloup-Laubat Jeantaud Duc Electric 57.65 92.78 First specialist land speed record vehicle, first 60 mph pass[8]
January 17, 1899 Achères, Yvelines, France Belgium Camille Jenatzy[7] La Jamais Contente Electric 65.792 105.882 First man to break a land speed record[7]
April 13, 1902 Nice, France
Promenade des Anglais		 France Léon Serpollet Gardner-Serpollet
Œuf de Pâques (Easter Egg)		 Steam[8] 75.06 120.80
Aug 5, 1902 Albis-St. Arnoult, France United States William K. Vanderbilt Mors Internal combustion 76.08 122.438 First IC-powered record[8]
January 12, 1904 Lake St. Clair, USA United States Henry Ford Ford 999 Racer Internal combustion n/a n/a 91.37 147.05 On frozen lake[9] (Not recognized by L'Automobile Club de France)
January 26, 1906 Ormond Beach, USA United States Fred Marriott Stanley Rocket[10] Steam 127.66 205.44 First speed greater than contemporary rail speed record.
July 12, 1924 France United Kingdom Ernest Eldridge FIAT Mephistopheles Internal combustion n/a n/a 145.89 234.98 Fastest LSR ever on a public road[10]

21st century renaissance

Main article: History of the electric vehicle

The emergence of higher volume manufacturing of electric powertrain vehicles has allowed for economies of scale and increased research and development of electrical batteries, the critical technology in electric powertrains. Specific energy (the amount of energy stored per unit mass) has typically been the greatest drawback of electric powertrains in comparison to gasoline combustion engine powertrains. Steady advances in battery technology, especially lithium-ion battery technologies first commercialized in the early 1990s have driven innovations in electric powertrains, and further battery advances allow them to once again compete with the combustion engine powertrains in motorsports events.

Electric drag racing is a sport where electric vehicles start from standstill and attempt the highest possible speed over a short given distance.[11] They sometimes race and usually beat gasoline sports cars.[12] Organizations such as NEDRA keep track of records worldwide using certified equipment.

Stoffel Vandoorne driving the Gen2 Formula E car at the 2019 Hong Kong ePrix.

At the Formula Student competition at the Silverstone Circuit in July 2013, the electric powered car of the ETH Zurich won against all cars with internal combustion engines. It is believed to be the first time that an electric vehicle has beaten cars powered by combustion engines in any accredited motorsport competition.[13]

In 2015, an electric car won all places of the Pikes Peak International Hill Climb. Also in that year the second place on all classes was won by an electric car. Already in 2014, electric cars had won second and third place.[14][15][16]

In January 2017, a pure electric car participated in the Paris-Dakar Rally and completed the entire route of 9,000 km (5,600 mi) through Argentina, Paraguay and Bolivia. The vehicle had been specially designed and built for the race. The car had a 250 kW engine (340 hp) and a 150 kWh battery. The battery consisted of several modules. Each module could be charged separately by power cable to speed up the charging process.[17]

Open-category series

Nobuhiro Tajima's Suzuki SX4 during his record-breaking 9:51 run in 2011
2016 Pikes Peak International Hill Climb Race timings for Gasoline vs. Electric powertrains

Pikes Peak International Hill Climb

Main article: Pikes Peak International Hill Climb

The Pikes Peak International Hill Climb, also known as The Race to the Clouds, is an annual automobile and motorcycle hillclimb to the summit of Pikes Peak in Colorado, USA. The track measures 12.42 miles (19.99 km) over 156 turns, climbing 4,720 ft (1,440 m) from the start at Mile 7 on Pikes Peak Highway, to the finish at 14,110 ft (4,300 m), on grades averaging 7.2%.[18]

The race is self sanctioned and has taken place since 1916, making it the second oldest motorsport event in the Western Hemisphere behind the Indianapolis 500.[18] It is currently contested by a variety of classes of cars, trucks, motorcycles and quads. There are often numerous new classes tried and discarded year-to-year. In the modern era, electric vehicles have competed in the event since 1983 (Joe Balls, Sears Electric car). In the 2-wheeled divisions, the electric powertrains are already able to outcompete the combustion engines; the 2013 overall winner was an electric bike, the Lightning Motorcycle LS-218 electric Superbike ridden by Carlin Dunne in a time of 10:00.694 minutes, a new course record for the 2-wheeled class.

In the 4-Wheeled Divisions, the results of recent years show that the relative improvements in race time are advancing at different rates in the electric classes compared to the unlimited/combustion engine classes. Unlimited class vehicles, with combustion engines, broke the 16 minute barrier in 1938, and have steadily improved over the subsequent decades, breaking the 10-minute barrier in 2011.[19] Meanwhile, the electric vehicle class broke the 16 minute barrier in 1994 (Katy Endicott, Honda Civic Shuttle finishing in 15:44:71 minutes), and the 10-minute barrier in 2013 (Nabuhiro 'Monster' Tajima, E-Runner finishing in 9:46:53 minutes).[19] In the 2014 event, the Mitsubishi team (MiEV Evolution III) achieved 2nd (Greg Tracey, 9:08.188 minutes) and 3rd position (Hiroshi Masuoka, 9:12:204 minutes) - within 3 seconds and 7 seconds (respectively) of the overall fastest vehicle, a gasoline powered Norma race car.[20] The graph to the right shows the relative rates of improvement of these two classes since the 1980s.

2015 for the first time in the history of the race was an electric car to win the race outright. The winning car was the Latvian team Drive eO's 3rd generation vehicle, eO PP03 with peak power of 1020 kW and peak torque of 2160 Nm, weighing 1200 kg. The time achieved was 9:07.222 minutes, just faster than Greg Tracey's 9:08.188 time in 2014. Second place was also earned by an electric car, the Tajima Rimac Automobili E-Runner Concept_One with peak power of 1100 kW, peak torque of 1500 Nm, and weighing 1500 kg.[21]

The winning driver Rhys Millen said in an interview that the vehicle had lost half its tractive power (due to heat) from around the halfway point. Based on testing the team had expected a run 30 seconds faster.[22]

Both the two above teams and drivers raced again in 2016, with evolutions of the vehicles, and were joined by a prototype '4-motor EV' from Acura based on the 2016 NSX production car, with heavy modifications to all-electric drive. The Acura, driven by Tetsuya Yamano, achieved a remarkable time for its first outing, finishing in 9:06:015 minutes, and third place overall. Drive eO's 4th generation vehicle, eO PP100 achieved a time of 8:57:118 minutes, improving on the previous year's time and coming second overall. The winning 2016 vehicle was a combustion engine Norma driven by Romain Dumas with a time 8:51:445 minutes. The Norma has similar power to weight ratio to the PP100, but weighs half as much and as a result has better traction in corners. Dumas' team also won in an earlier version of the same vehicle in 2014 with a time of 9:05:801 minutes, thus improving by some 14 seconds over 2 years technological evolution. The Drive eO vehicle improved by some 10 seconds in one year, over its 2015 time.

In 2018, the outright winner was the all electric I.D. R Pikes Peak Prototype driven by Romain Dumas, in new overall record time 7:57.148 minutes. The previous track record stood at 8:13.878 minutes, driven by Sébastien Loeb in the 2013 Peugeot 208 T16 Pikes Peak. Now that electrics have overtaken the performance of gasoline cars on Pike's Peak, it seems likely that electric cars will continue to dominate this race from 2018 onwards. Electric cars are still relatively early in their motorsport development with much room for further improvement, whereas gasoline powered cars have had over a century of development, with only incremental improvements likely to come in the future.

Isle of Man TT

Main articles: Isle of Man TT and TT Zero
Komatti-Mirai EV, 2013 TT Zero

TT Zero is part of the Isle of Man TT and races for 1 lap (37.733 miles) of the Snaefell Mountain Course. The TT Zero event as an officially sanctioned Isle of Man TT race is for racing motorcycles where "The technical concept is for motorcycles (two wheeled) to be powered without the use of carbon based fuels and have zero toxic/noxious emissions."[23]

The inaugural 2010 TT Zero race was won by Mark Miller riding a MotoCzysz E1pc motor-cycle in 23 minutes and 22.89 seconds at an average race speed of 96.820 mph for 1 lap (37.733 miles) of the Mountain Course and the first United States winner since Dave Roper won the 1984 Historic TT riding a 500cc Matchless. The TT Zero race replaced the TTXGP franchise with the simplification of the regulations[24] and the emphasis on electric powered motor-cycles.[25] The MotoCzysz E1pc was also the first American manufactured motor-cycle to win an Isle of Man TT Race since Oliver Godfrey won the 1911 Senior TT with an Indian V-Twin motor-cycle.

Since joining the event in 2012, and following a brace of runner-up finishes in 2012/2013, the Japanese team Mugen won the TT Zero race for the first time in 2014, and were victors in the race for 6 consecutive years through to 2019, setting 4 new lap records, and becoming the first electric motorcycle to lap the Snaefell Course at an average speed in excess of 120 mph (190 km/h) in the process.

The riders of the TT Zero bikes are typically those that also compete in the combustion engine classes and are very experienced on the circuit. Comparing the experience of the different powertrains, Lee Johnston said as he climbed off his electric bike in the 2015 practice sessions: “That was just mint. It feels so stable, it’s unbelievable. It’s just so peaceful. No revving.” Asked for what was memorable, he responded “I think just the peace and quiet and riding over the mountain, no noise and seeing the sunset..."[26]

Fastest race lap by year

(practice & qualifying session laps not included)

Year Rider(s) Machine Lap time Average speed
mph km/h
2010 Mark Miller MotoCzysz E1pc / MotoCzysz 23:22:89 96.820 155.817
2011 Michael Rutter MotoCzysz 22:43:68 99.604 160.297
2012 Michael Rutter MotoCzysz 21:45:33 104.056 167.462
2013 Michael Rutter MotoCzysz 20:38:461 109.675 176.505
2014 John McGuinness Mugen Shinden San / Team Mugen 19:17:300 117.366 188.882
2015 John McGuinness Mugen Shinden Yon / Team Mugen 18:58:743 119.279 191.961
2016 Bruce Anstey Mugen Shinden Go / Team Mugen 19:07:043 118.416 190.572
2017 Bruce Anstey Mugen Shinden Roku / Team Mugen 19:13:924 117.410 188.953
2018 Michael Rutter Mugen Shinden Nana / Team Mugen 18:34:956 121.824 196.057
2019 Michael Rutter Mugen Shinden Hachi / Bahams Mugen 18:34.172 121.91 196.195

The TT Zero lap speeds have been improving at an average rate of around 2 mph in recent years (121.824 mph as of 2018). With more mature technology, the combustion engine bikes' lap speeds in the mainstream TT have been improving at a lower rate of around 1 mph each year in recent years (135.452 mph as of 2018). It's likely that the electric bikes will surpass the combustion bikes at some point, but it may not happen until the mid to late 2020s.

FIA World Endurance Championship

Nissan ZEOD RC, first electric vehicle to complete a lap of Le Mans
Main article: FIA World Endurance Championship

The FIA World Endurance Championship is an auto racing world championship organized by the Automobile Club de l'Ouest (ACO) and sanctioned by the Fédération Internationale de l'Automobile (FIA). The series usurps the ACO's former Intercontinental Le Mans Cup which began in 2010, and is the first endurance series of world championship status since the demise of the World Sportscar Championship at the end of 1992. The World Endurance Championship name was previously used by the FIA from 1981 to 1985.

The series feature multiple classes of cars competing in endurance races, with sports prototypes competing in the Le Mans Prototype categories, and production-based grand tourers competing in the LM GTE categories. World champion titles are awarded to the top scoring manufacturers and drivers over the season,[27][28] while other cups and trophies will be awarded for drivers and private teams.[29]

The Nissan ZEOD RC was designed by Ben Bowlby, who previously designed the 2012 Garage 56 entry DeltaWing as an employee for DeltaWing Project 56 LLC, a consortium led by Don Panoz. He previously worked for DeltaWing LLC, a Chip Ganassi company created to develop a DeltaWing concept race car for IndyCar. Nissan provided an engine and received naming rights on the Garage 56 entry at the 2012 Le Mans race, as well as and other 2012 American Le Mans Series races

The ZEOD RC had a hybrid electric drivetrain with lithium ion battery packs in a chassis similar in design to the DeltaWing.[30] In a June 22, 2013 article at Autosport.com, Bowlby said: "This is a new car, but it uses the narrow track technology of the DeltaWing and that gives us great efficiency. It is something we understand and it is an efficient way of getting around Le Mans."

At the 2014 24 Hours of Le Mans, the car had to retire during the race's early hours due to a gearbox failure. However it managed to achieve its goals of reaching a speed above 300 km/h and completing a lap in Le Mans using electric power only.

Rally Paris-Dakar

Main article: Dakar Rally

In January 2017, a pure electric car participated in the Paris-Dakar Rally and completed the entire route of 9000 km through Argentina, Paraguay and Bolivia. The vehicle had been specially designed and built for the race. The car had a 250 kW engine (340 hp) and a 150 kWh battery. The battery consisted of several modules. Each module could be charged separately by power cable to speed up the charging process.[31]

All-electric series

The Formula E race in Berlin Tempelhof, 2015.

Formula E

Main article: Formula E

Formula E is the highest class of competition for electrically powered single-seater racing cars.[32] The series was conceived in 2012, and the inaugural championship started in Beijing in September 2014.[33] Since the 2020–21 season, the Formula E Championship has FIA World Championship status.[34]

MotoE World Cup

Main article: MotoE World Cup

The MotoGP motorcycle world championship has an all-electric support series called MotoE World Cup since 2019.[35] The series currently uses the Energica Ego Corsa motorcycle, manufactured by Energica Motor Company.[36]

Pure ETCR

Main article: Pure ETCR

Pure ETCR a planned touring car series for electric cars. It was announced ahead of the 2018 Geneva Motor Show by TCR promoter WSC Ltd.[37] The inaugural season is currently planned to start in June 2021.[38]

Extreme E

Main article: Extreme E

Extreme E is an off-road racing series that uses electric SUVs to race in extremely remote parts of the world, such as the Amazon rainforest or the Arctic. The series was conceived in 2018, and the inaugural championship is scheduled to begin in spring 2021.[39]

Rallycross

Because of the short races, rallycross is well suited for electric vehicles. Several plans for electric rallycross series exist:

Projekt E

The Projekt E electric rallycross car

As part of the 2020 World Rallycross season, an electric support series called Projekt E held its first races.[40] During the COVID-19-shortened season, only two Projekt E rounds could take place. British driver Natalie Barratt was crowned first Projekt E champion.[41]

RX2e

A second-tier electric support series to the World Rallycross Championship is RX2e, with an first season of six races planned for 2021. It uses a spec car developed by QEV Technologies and Swedish rallycross team Olsbergs MSE.[42]

World Rallycross (WRX)

It is currently planned to introduce electric vehicles into the main "World RX" category by 2022.[43]

Nitro Rallycross

The rallycross event from the Nitro World Games will be expanded to a full series in 2021 and an electric class will be added in 2022. The electric car, designated FC1-X, is also developed by QEV Technologies and Olsbergs MSE.[44]

SuperCharge

SuperCharge is a proposed series for electric cars with rallycross-style races. The first season is currently expected for 2022. The car will use spec powertrain and battery.[45]

Andros Trophy

The Andros Trophy, a French ice racing series, began experimenting with electric cars in 2007. An electric car class was added in 2010. The car, developed by Exagon, features a 67 kW engine and a total weight of 800 kg. Since the 2019–20 season, the series has exclusively featured electric cars.[46]

Jaguar I-Pace eTrophy

Main article: Jaguar I-Pace eTrophy

The Jaguar I-Pace eTrophy was a stock car support series for Formula E run by Jaguar lasting for two Formula E seasons from 2018 to 2020. The races took place on the same tracks and on the same day as the Formula E races.

Electric GT

Main article: Electric Production Car Series

A series with all-electric GT cars (in the first season all Tesla Model S), called Electric GT (EGT) was planned to start in 2018, but has been postponed.

World Solar Challenge

Nuna 7, winner of the 2013 Bridgestone World Solar Challenge
Main article: World Solar Challenge

The World Solar Challenge is a biennial solar-powered car race which covers 3,021 km (1,877 mi) through the Australian Outback, from Darwin, Northern Territory to Adelaide, South Australia.

The race attracts teams from around the world, most of which are fielded by universities or corporations although some are fielded by high schools. The race has a 28-year history spanning twelve races, with the inaugural event taking place in 1987.

Future prospects

Electric powertrains have advantages over combustion engines in power delivery and vehicle dynamics (especially on motorbikes), but still have range disadvantages in longer races (note that combustion engine vehicle often have to refill energy supply also, e.g. Isle of Man TT bikes refill every two laps). Early electric challengers to combustion engine vehicles are therefore typically in shorter more intensive races such as hill climbs or other limited distance races, or simply in fastest lap times (e.g. around the Isle of Man Snaefell circuit). Nevertheless, for endurance racing, hybrid electric powertrains have also proven their advantages over pure combustion engine powertrains, with recent years at the 24 Hours of Le Mans all won by the hybrid electric Audi R18 e-tron quattro.

See also

References

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  2. ^ "World's first electric car built by Victorian inventor in 1884". The Daily Telegraph. London. 2009-04-24. Retrieved 2009-07-14.
  3. ^ Fuller, John (2009-04-09). "What is the history of electric cars?". auto.howstuffworks.com. Retrieved 2014-12-14.
  4. ^ "La Jamais Contente" (PDF). Archived from the original (PDF) on 2010-12-18. Retrieved 2015-06-06.
  5. ^ "EV Zero?". EV1 Club. Archived from the original on 2006-10-12. Retrieved 2006-10-18.
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  8. ^ a b c Northey, p. 1162.
  9. ^ Cars Against the Clock, The World Land Speed Record, Robert B. Jackson (New York, Henry Z. Walck, Inc.), p.19, ISBN 0-8098-2078-1
  10. ^ a b Northey, p.1163.
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  12. ^ "MythBuster: Why Electric Vehicles Beat Gas in 5 Extreme Tests". Popular Mechanics. 2008-05-18. Retrieved 2016-05-24.
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  14. ^ Collie, Scott (2015-06-29). "Electric power lights up Pikes Peak". GizMag. Australia. Retrieved 2017-07-09.
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  17. ^ "Dakar Rallye: Erstmals 100% elektrisch im Ziel". oekonews.at. 2017-01-07. Retrieved 2017-07-09.
  18. ^ a b PPIHC race overview, "Archived copy". Archived from the original on 2014-07-27. Retrieved 2015-06-06.{{cite web}}: CS1 maint: archived copy as title (link)
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    "    . Live Timing. US: North Country Timing & Scoring and LiveTiming.net. Archived from the original on 2014-07-16. Retrieved 2014-06-30.
  21. ^ Biesbrouck, Tim (2015-06-01). "Tajima and Rimac reveal 1100kW electric Pikes Peak racer + photos and specs". Electric Autosport. Retrieved 2016-10-21.
  22. ^ Rhys Millen Wins Pikes Peak First Electric Car Victory. Retrieved 2016-10-21 – via YouTube.
  23. ^ REGULATIONS TT ZERO – 2010 International Tourist Trophy – Isle of Man 29 May – 11 June p27 ACU Events Ltd (2010)
  24. ^ Isle of Man Tourist Trophy Races – Official Programme May 29–11 June 2010 page 14 Isle of Man Department of Community, Culture & Leisure – ACU Events Ltd (2010) Mannin Media Group Ltd
  25. ^ REGULATIONS TT ZERO – 2010 International Tourist Trophy – Isle of Man 29 May – 11 June Appendix C page 25–27 ACU Events Ltd (2010)
  26. ^ "Victory Racing Breaks the 100mph Average Lap Speed Barrier on its First TT Practice Session". Cycle World. US. 2015-06-06. Retrieved 2016-10-21.
  27. ^ "2012 FIA World Endurance Championship". fia.com. Fédération Internationale de l'Automobile. 2011-06-03. Archived from the original on 2011-06-06. Retrieved 2011-06-04.
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  30. ^ O'Leary, Jamie (2013-06-21). "Nissan unveils electric Le Mans Garage 56 car". Autosport. Haymarket Press. Retrieved 2013-06-28.
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  32. ^ "FIA Formula E Championship". fia.com.
  33. ^ "Formula E opens with spectacular crash involving Nick Heidfeld and Nicolas Prost as Lucas di Grassi claims win". Daily Telegraph. 2014-09-13. Retrieved 2014-09-13.
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  37. ^ "WSC to launch electric E-TCR touring car series". TouringCars.Net. 2018-03-02.
  38. ^ "Five-star schedule revealed for inaugural PURE ETCR season". pure-etcr.com. 2021-02-01.
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  40. ^ Ridge, Hal (2019-09-13), First Projekt E electric rallycross car unveiled at Latvian WRX, autosport.com, retrieved 2019-09-17
  41. ^ "Projekt E: Barratt crowned inaugural champion". overtakemotorsport.com. 2020-11-27.
  42. ^ "RX2e car revealed ahead of 2021 debut". dirtfish.com. 2020-11-18.
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  46. ^ "Trophee Andros Goes Fully Electric; Adds RX Version". e-racing365.com. 2019-06-05.
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